Pour the oils into a wok or large frying pan. When hot, add the chicken and stir-fry for 5 minutes, until lightly browned. Add the garlic and ginger and cook for 1 minute.
Add the mixed vegetables and stir-fry for 3 minutes. Mix in the peanuts and the noodles and stir-fry for 2–3 minutes until hot. Add the chilli sauce, soy sauce and fish sauce, if using, and cook for 1 minute. Spoon into small bowls, and garnish with torn coriander leaves, if liked.